[libvirt] [PATCHv2 1/3] qemu: save domain status after set the blkio parameters

[Shanzhi Yu]

After set the blkio parameters for running domain, save the change into
live xml is needed to survive restarting the libvirtd, same story with
bug 1146511, meanwhile add call qemuDomainObjBeginJob/qemuDomainObjEndJob
in qemuDomainSetBlkioParameters

Signed-off-by: Shanzhi Yu <shyu at redhat.com>
---
 src/qemu/qemu_driver.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index d111ccd..37d1a86 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -7992,15 +7992,18 @@ qemuDomainSetBlkioParameters(virDomainPtr dom,
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
 
+    if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
+        goto cleanup;
+
     if (virDomainLiveConfigHelperMethod(caps, driver->xmlopt, vm, &flags,
                                         &persistentDef) < 0)
-        goto cleanup;
+        goto endjob;
 
     if (flags & VIR_DOMAIN_AFFECT_LIVE) {
         if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_BLKIO)) {
             virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                            _("blkio cgroup isn't mounted"));
-            goto cleanup;
+            goto endjob;
         }
     }
 
@@ -8093,9 +8096,12 @@ qemuDomainSetBlkioParameters(virDomainPtr dom,
                 VIR_FREE(devices);
             }
         }
+
+        if (virDomainSaveStatus(driver->xmlopt, cfg->stateDir, vm) < 0)
+            goto endjob;
     }
     if (ret < 0)
-        goto cleanup;
+        goto endjob;
     if (flags & VIR_DOMAIN_AFFECT_CONFIG) {
         /* Clang can't see that if we get here, persistentDef was set.  */
         sa_assert(persistentDef);
@@ -8133,6 +8139,10 @@ qemuDomainSetBlkioParameters(virDomainPtr dom,
             ret = -1;
     }
 
+ endjob:
+    if (!qemuDomainObjEndJob(driver, vm))
+        vm = NULL;
+
  cleanup:
     if (vm)
         virObjectUnlock(vm);
-- 
1.9.3